I'm taking apart a 1250 motor with under 1700 miles on it. I thought I'd start a thread on what I'm seing as I disassemble it, and maybe I can answer some quesions you guys might have.
I've also posted this stuff on MS, I thought I'd put it here too if that's not bad manners or anything.
So far, some interesting things are the valve shims. All the exhaust shims are 165, and all the intake shims are 175. That's the way they came from the factory, this engine has not been adjusted.
The cylinder block is not sleeved. It is all one cast aluminum unit, and the cylinder walls appear to be plated.
Also the cylinders #1 & #2 and #3 & #4 are very close together, there doesn't look like a lot of room for boring this motor out. If you did, you probably couldn't go over 1 millimeter without the walls getting pretty thin between. And I don't know what you'd do when it comes time for new rings, I guess it would have to replace the whole cylinder block, unless you could get it slightly re-bored and then re-plated.
The cam lobes are pretty pointy. they look like they have alot of lift but short duration. Anybody have the specs for the cams?
The tranny gears all all in the top half of the case, on two main shafts. They are straight-cut gears with a slight beveled edge. They look pretty massive.
The clutch pack is HUGE. :eek:
The cam cover has a big one-piece rubber gasket that fits in a groove that goes all around the edge. The rubber half-round end caps are part of the gasket and so are the o-rings that fit around the spark plug tunnels. It looks pretty sturdy and should be re-usable.
There's 4 cam caps, 2 journals on each one, with numbers for each bolt. There an oil pipe that connectsthe right front bank to therear bank. When I took them off I had the motor at TDC and loosened the bolts in reverse order according to the numbers, and the cams lifted right out nicely.
I'll put some more stuff up later and if anyone wants to know something just ask and I'll check it out.